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Use of parasitic biological agents for prevention and control of autoimmune diseases

a technology of autoimmune diseases and biological agents, which is applied in the field of use of parasitic biological agents for the prevention and control of autoimmune diseases, can solve the problems of ulcerative colitis rare in underdeveloped countries, unhealthy to be raised in an “over clean” environment, and worm expulsion or limitation of infection, so as to prevent or treat an excessive immune response and reduce the excessive immune response in the individual

Inactive Publication Date: 2007-12-27
UNIV OF IOWA RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method of preventing or treating excessive immune responses in individuals by administering a helminthic parasite preparation. This can involve using whole parasites, parasite extracts, or other parasite-related products. The helminthic parasite can be selected from a variety of sources, such as nematodes, platyhelminths, and filarial parasites. The method can be used to treat autoimmune diseases such as IBD, rheumatoid arthritis, and multiple sclerosis. The helminthic parasite can be administered in various ways, such as through injection or orally. The invention also includes a pharmaceutical composition containing a helminthic parasite preparation and a carrier. Overall, the patent provides a novel method for preventing or treating excessive immune responses using helminthic parasites.

Problems solved by technology

Helminths incite an intestinal Th2 response, which can cause worm expulsion or limit the magnitude of infection.
An alternative explanation is that it is unhealthy to be raised in an “over clean” environment.
Also, ulcerative colitis is rare in underdeveloped countries.

Method used

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  • Use of parasitic biological agents for prevention and control of autoimmune diseases
  • Use of parasitic biological agents for prevention and control of autoimmune diseases
  • Use of parasitic biological agents for prevention and control of autoimmune diseases

Examples

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example 1

General Methods

[0130] Animals: Colonies of 129 / SV IL-10− / − mutant mice, and appropriate control animals are maintained are housed in facilities maintained as a specific pathogen-free environment according to standard methods.

[0131] Parasite Maintenance, Animal Infection, Production of Schistosome Eggs: The maintenance of T. muris and the method used for infection are as described by Else and Wakelin, 1990, Parasitology, vol. 100, part 3: 479.

[0132] Schistosome eggs were harvested from the livers of schistosome-infected hamsters and stored as described by Elliott, 1996, Methods: A Companion to Methods in Enzymology, 9:255. Five infected hamsters yield about 2×106 eggs.

[0133] Preparation of T. suis Eggs: the following process was used in the preparation and harvesting of T. suis eggs. Adult T. suis worms were isolated from the colon of pigs 7-8 wks after exposure to an experimental inoculation of T. suis eggs. Embryonated eggs were obtained by culturing adult worms in vitro, and t...

example 2

Th2 Response to S. mansoni Down-Modulates an Ongoing Th1 Response to an Unrelated Bacterial Th1-Inducing Antigen

[0141] It is well established that Th cell immune responses can polarize into Th1 or Th2 patterns. This polarization occurs because IFNγ from Th1 cells inhibits proliferation of Th2 cells, while IL-4 and IL-10 from Th2 cells inhibits development of Th I cells. The following experiments demonstrated that schistosomiasis alters the murine Th1 response to an established mycobacterial infection.

[0142] Mice were co-infected with M. avium and S. mansoni to evaluate the host response to these distinctly different Th1 and Th2 inflammatory stimuli. BALB / cAnN mice develop chronic M. avium infection when injected with this organism (106 CFU). Sixty days after establishment of the mycobacterial infection, the mice were infected with S. mansoni (40 cercariae). The mice were killed sixty days later. Control groups included mice receiving either M. avium only for 120 days or S. mansoni...

example 3

Colonization with Intestinal Helminths or Exposure to their Ova Attenuates Th1-Type Gut Inflammation in Murine TNBS-Induced Colitis

[0146] Rectal instillation of TNBS in 50% ethanol induces a colitis in mice that shares features with Crohn's disease. The colonic inflammation is characterized by infiltrating CD4+ T cells with elevated IFNγ mRNA expression. Lamina propria T cells from TNBS treated mice secrete 50 fold more IFNγ and 5 fold less IL4 than T cells from controls (Neurath et al., 1995, supra). Lamina propria mononuclear cells secrete 30 fold more TNFα than cells from control mice (Neurath et al., 1997, Eur. J. Immunol., 27: 1743). Importantly, TNBS colitis can be prevented or improved by treatment with anti-IL-12 (Neurath et al., 1995, supra), anti-TNFα (Neurath et al., 1997, supra), or rIL-10 (Duchmann et al., 1996, Eur. J. Immunol., 26: 934). TNBS-induced colitis also can be prevented by previous oral exposure to the hapten (Elson et al., 1996, J. Immunol., 157: 2174) pro...

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Abstract

The invention relates to a method of treating an excessive immune response including an aberrant / enhanced Th1 response by administering a helminthic parasite preparation in an amount sufficient to reduce the excessive immune response in an individual. This invention is generally directed to autoimmune diseases which involve an excessive immune response or an aberrant / enhanced Th1 response. More specifically, the present invention is directed to the treatment of Crohn's disease and ulcerative colitis, both known as IBD. While the present invention discloses specific information about the treatment of IBD, the disclosure is in no way limiting. Additionally, rheumatoid arthritis, type 1 diabetes mellitus, lupus erythematosis, sarcoidosis and multiple sclerosis can be treated by the methods and compositions disclosed therein.

Description

FIELD OF THE INVENTION [0001] This invention relates to the prevention and / or treatment of a condition or disease state in an individual which results from an excessive immune response. BACKGROUND OF THE INVENTION [0002] Parasites are living entities that dwell on or in other creatures during some part of their life cycles, drawing nourishment from the host. Parasites that inhabit the intestines have a complex interplay with the mucosal immune system. They must establish a tranquil relationship with host mucosal defenses to survive. Helminths are elaborate multicellular worms with complex life cycles and development. The nematodes (non-segmented roundworms) and the platyhelminths (flatworns) are the two groups of helminths that colonize the human intestines. Perhaps more than a third of the population of the world currently shelter one or more of these organisms. The life-time exposure rate, however, is actually much more. The prevalence of helminths is highest in warm climates and ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K35/12A61K35/00A61K35/54A61P1/00A61K35/56A61K35/62A61K39/00A61P3/10A61P29/00A61P37/02A61P43/00
CPCY10S530/855A61K35/62A61P1/00A61P1/04A61P17/00A61P19/02A61P21/00A61P25/00A61P29/00A61P37/00A61P37/02A61P37/06A61P43/00A61P3/10
Inventor WEINSTOCK, JOEL V.ELLIOTT, DAVID E.
Owner UNIV OF IOWA RES FOUND
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